JOURNAL 
OF THE 
ROYAL MICROSCOPICAL SOCIETY. 
DECEMBER 1896. 
TRANSACTIONS OF THE SOCIETY. 
X. — The Foraminifera of the Gault of Folkestone . — IX. 
By Frederick Chapman, A.L.S., F.R.M.S. 
( Read 21 st October , 1896.) 
Plates XII. and XIII. 
Subfamily FOL YMOPiPHININJE — continued. 
Sagrina (d’Orbigny), Parker and Jones [1865]. 
Sagrina asperula , plate XII. fig. 1. 
Test stoutly built, cylindrical, slightly tapering at the aboral end. 
l>ne uvigerine commencement has few segments: the succeeding 
nodosarine chambers are short, -well-inflated, and with deeply im- 
pressed sutural lines. Surface of test covered with numerous small 
tubercles. Length of well-grown individuals, 1/36 in. 
S. asperula occurs in the Gault of Folkestone in zone i., specimen 
h, common ; zone iii., rare ; zone v., common ; zone vii., very rare. 
EXPLANATION OF PLATES. 
Plate XII. 
Fig. 1. — Sagrina asperula sp. nov. x 40. 
„ 2. — Ramulina laevis Rupert Jones. X 30. 
,, 3-6. — R. globulifera Brady. Chief varieties of Gault specimens, showing the 
inflated parts of the test. Fig. 3, an elongate segment, the commonest 
type in the Gault. Fig. 4, a specimen more nearly approaching the 
form of recent specimens. Fig. 5, a segment giving off four arms or 
stolons. Fig. 6, a compressed variety, showing by the short tubular 
processes an affinity towards the fistulose Polymorpliinx. All x 45. 
„ 7-9. — R. aculeata J. Wright. Fig. 7, a complete segment, with fragment of 
another, x 33. Fig. 8, a stolon or cylindrical fragment, witli vestiges of 
branches, x 30. Fig. 9, a terminal fragment, giving off short twisted 
processes, x 30. 
„ 10. — R. cervicornis Chapman sp. Young specimen, showing initial chamber! 
and a short cervicorn segment, x 22. 
„ 11. — R. cervicornis. A well-grown individual, showing the initial series suc- 
ceeded by two nearly equal arms, each with cervicorn terminations, x 15. 
„ 12. — Vitriwebbina laevis Solla3 sp. A specimen with an initial polymorphine 
series, attached to a fragment of glauconite, x 23. 
2 s 
1896 
